diff --git a/tools/python/xen/util/pci.py b/tools/python/xen/util/pci.py
index b889d1816e..98bea1aead 100644
--- a/tools/python/xen/util/pci.py
+++ b/tools/python/xen/util/pci.py
@@ -462,6 +462,7 @@ def find_sysfs_mnt():
     return None
 
 def get_all_pci_names():
+    if not sys.platform.startswith('linux'): return []
     sysfs_mnt = find_sysfs_mnt()
     if sysfs_mnt is None:
         return None